True or false
Melanin is a pigment that helps protect cells from UV radiation

True

True or False
Melanin is present in individuals known as albinos

False

True or False
Melanin is not present in individuals known as albinos

True

True or False
At birth, lanugo hairs cover the scalp, eyelids and eyebrows of the infant

False

It is present before birth

Vitamin A is synthesized by the skin

True

True or False
The hair follicle protrudes above the surface

False

Hair is present only on thick skin

False

Cyanosis may cause a reddish tint to the skin

True

Keratinization
A. occurs in the dermis
B. results in the formation of new epidermal cells
C. determines skin colorD. produces a layer of cells that resists abrasion

D. produces a layer of cells that resists abrasion

(this multiple choice question has been scrambled)

The portion of the nail that produces most of the nail is the
A. lunula
B. eponychium
C. nail rootD. nail matrix

D. nail matrix

(this multiple choice question has been scrambled)

The layer of the epidermis that undergoes mitosis and forms new epidermal cells is the
A. stratum lucidumB. stratum basale
C. stratum granulosum
D. stratum corneum

B. stratum basale

(this multiple choice question has been scrambled)

Intact skin provides protections because

A. It forms a physical barrier against the entry of microbes
B. It’s secretions keep the skin slightly alkaline
C. The skin contains components from the excretory system
D. The skin enhances water loss from the body

A. It forms a physical barrier against the entry of microbes

(this multiple choice question has been scrambled)

Contractions of the arrector pili muscle

A. empties the sweat glands
B. causes the hair to curl
C. occurs in response to the heatD. leads to “goose bumps” on the skin